Reference for Menachot 46:12

מה הקטרה האמורה בקומץ אין הקומץ מבטל את חבירו אף הקטרה האמורה בשירים אין שירים מבטלין את הקומץ

IF, HOWEVER, IT WAS OFFERED, THEN THE MEAL-OFFERING FROM WHICH THE HANDFUL HAD BEEN TAKEN DISCHARGES THE OWNER'S OBLIGATION, WHILST THE OTHER FROM WHICH THE HANDFUL HAD NOT BEEN TAKEN DOES NOT DISCHARGE THE OWNER'S OBLIGATION. We see then that the meal-offering from which the handful had not been taken does not neutralize the handful.

Jastrow

Jastrow